Improvement in compositions for paving and roofing



UNITED STATES AROHIBALD B. VANDEMARK, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN COMPOSITIONS FOR PAVING AND ROOFING.

Specification forming part of Letters Patent No. 117,946, dated August 8, 1871.

To all whom it may concern:

Be it known that I, ARGHIBALD B.VANDEMARK, of Jersey City, in the county of Hudson and in the State of New Jersey, have invented certain new and useful Improvements in Paving and Roofing Compounds; and. I do hereby declare that the following is a full, clear, and exact description thereof.

The object of my invention is the production of a composition for pavements and roofing, which shall be impervious to water, unaffected by the heats of summer orthe frosts of winter, finegrained, homogeneous, tough, and durable and the invention consists in the combination, 1nixture, and appliance of the constituent parts, which together make the complete composition.

This composition is made as follows, viz.: Of one hundred parts by bulk I take of the asphaltum of commerce from seventy to eightyfive parts, and of the heaviest parafiine oil from fifteen to thirty parts, and place them together in a proper vessel, where they are heated at a temperature just below that which would be destructive to the asphaltum, and kept agitated or stirred constantly until the asphaltum and parafiine become thoroughly mixed and take the appearance of a thick liquid of a homogeneous character. At the same time I take calcareous stone, which has been first thoroughly pulverized by proper means, and place it in suitable vessels, to which heat is applied until all the moisture is expelled from the stone. I then take by bulk of the mixture first describedof asphaltum and parafline oil-from fifteen to thirty parts, and seventy to cighty-five parts of the pulverized stone, both the mixture and stone being hot, and mix these in a suitable heated vessel where the same are thoroughly agitated or stirred until they become entirely blended together and homogeneous. This compound, when cool, becomes the composition which is the subj ect-matter of this application.

In use for pavements for streets, sidewalks, alleys, or paths, a foundation is first made of broken stone thoroughly rolled, or of cement or any other sort of foundation which is firm and tolerably uniform, and upon this foundation I pour my compound hot from the vessels, rolling until a quantity, in bulk about equal to said mixture, is absorbed in it. This preparation is then poured hot upon the roof in a thin sheet and suit-' ably rolled while hardening.

The pavements which have heretofore been made of sand, gravel, broken stone,-and coal-tar or asphaltum, have been subject to defect in wear by reason of the non-union or imperfect union of the stony portions with the cementing or binding portions of the compound, whereby, under the influence of the elements and the abrasion of-travel,

the stone, gravel, or sand works out and becomes separated from the remainder of the mass, which then becomes rough or rutted and in the way of early destruction.

In my pavement the pulverized stone becomes an integral part of a homogeneous mass, all of which is smooth and continues smooth by wear. This pavement, moreover, is exceedingly tough, resisting fracture admirably, and from the character of its constituent parts and their manner of union, will resist equally well the heat or the cold.

Having thus described my invention, what I claim as new therein is- 1. Oombinin g asphaltum, paraffme oil, and pulverized calcareous rock, in the proportions and manner substantially as described.

2. The paving and roofing composition, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand this 27th day of July, 1871.

ARGHIBALD B. VANDEMARK.

Witnesses:

EDM. F. BROWN, JOHN R. YOUNG. 

